Mesosaurus, (genus Mesosaurus), early aquatic relative of reptiles, found as fossils from the Early Permian Period (299 million to 271 million years ago) in South Africa and South America. Mesosaurus lived in freshwater lakes and ponds. Elongated and slim, it measured about 1 metre (3.3 feet) long.
Explanation:
Mesosaurus fossils are found today in rocks in southern Africa and eastern South America. Back in the Permian those two locations were jammed against each other as part of the southern half of Pangaea called Gondwana, so the living range of Mesosaurus did not span an entire ocean.
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Codominance occurs when both alleles participation in the expression of the genotype of an offspring, such as a flower with patches of different colours, each coming from a different allele.
